Subnautica is a survival game developed by Unknown Worlds Entertainment, first released in early access in 2014 and fully launched in 2018. Inside the game, the PDA acts as a calm artificial assistant that warns the player about biomes, resources and hostile fauna. Its leviathan warning became a favourite clip outside the game because leviathan class creatures are the largest and most feared predators in its ocean. Players and editors shared the line across gaming videos and social posts, turning a routine system alert into a widely recognised signal that danger is near.